Math Calculators
Math calculators for homework, work spreadsheets and quick checks. Each tool shows the formula it uses and the steps behind your answer, so you can follow the method instead of just copying a number.
Start with the Percentage Calculator for discounts, grades and percent change, or use the Linear Regression Calculator to fit a line to your data.
- Percentage CalculatorFind a percent of a number, what percent one number is of another, percent change, and percent difference.
- Linear Regression CalculatorGet the regression line equation, slope, intercept, r, r², standard error and a scatter plot from pasted x, y data.
- Complex Number CalculatorComplex arithmetic plus conjugate, modulus, argument, polar and exponential form, integer powers and all nth roots.
- Basic CalculatorAn online calculator with a keypad, keyboard support, percent and square root keys, step-by-step order of operations and history.
- Geometric Mean CalculatorGeometric mean of a list of numbers, or the compound average of growth rates and returns, with steps.
- Cube CalculatorFind a cube's volume, surface area, edge and diagonals from any one measurement, or cube any number (x³).
- Area of a Sector CalculatorSector area, arc length, chord, perimeter and segment area from radius, diameter, angle or arc length.
Other categories
- Finance CalculatorsDividend reinvestment, car out-the-door prices and credit card points vs. cash.
- Home & Construction CalculatorsEstimate bricks, tile grout and drop ceiling materials before you buy.
- Date & Time CalculatorsCourt and legal deadlines with federal holidays, and cattle calving dates.
- Science CalculatorsG-force, exponential decay and half-life, and dihybrid genetic crosses.
- Everyday & Hobby CalculatorsLinux file permissions, Minecraft Nether coordinates and barbell plate loading.